Hair brush



FIG. 1 is a top plan view of a hair brush in accordance with our ornamental design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a front perspective view thereof;

FIG. 6 is a rear elevation view thereof;

FIG. 7 is a rear perspective view thereof; and,

FIG. 8 is a right side elevation view thereof.

Those portions of the Figures shown in broken lines are included for environmental purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a hair brush, as shown and described. 